KUHL

ELECTRONIC CONTROL

COOL ONLY MODELS

SS08M10A, SS10M10A, SS12M10A, SS14M10A

SS12M30A, SS15M30A

SM18M30A, SM21M30A, SM24M30A

COMPRESSOR

C

R

OLP

S

 

 

 

BLUE RED BLACK

BLACK

CAPACITOR

 

 

COM

 

 

RED

 

 

 

 

CAPACITOR

 

 

 

 

GREEN BRACKET

H

 

 

N

TO CHASSIS

R

 

 

 

E

 

A

 

 

M

F

 

BLUE

 

 

 

 

 

 

 

SCHEMATIC

WIRING DIAGRAM

UI HOLDER ELECTRONICS ASY

 

OD AIR SENSOR

 

 

 

 

OD COIL SENSOR

 

 

 

 

ID COIL SENSOR

 

 

 

BLACK

F4

 

 

 

RELAY

 

 

 

BLUE

F3

 

 

 

RELAY

 

 

 

 

 

 

 

ORANGE

F2

 

 

 

RED

RELAY

 

 

 

F1

 

 

 

 

 

 

 

 

RELAY

 

 

 

 

 

 

DCHRG

 

 

 

 

AIR

TO

 

 

 

SENSOR

DISPLAY

 

L2 or ACN

 

 

 

 

 

 

AMBIENT

 

 

COMP

 

AIR SENSOR

 

RELAY

 

 

 

 

L1

 

 

 

 

BLACK

 

 

 

 

WHITE

GREEN/YELLOW

 

 

 

GREEN

 

 

WHITE

WHITE

 

SUPPLY CORD

 

 

 

 

BROWN

 

 

 

 

 

 

OR

 

 

GREEN

MOTOR

 

TO CAPACITOR

 

BRACKET

 

 

 

 

TO INNERWALL/

MOTOR MOUNT

MAX

L1

4

F4

HIGH

3 F3

MEDIUM

2 F2

LOW

USER INTERFACE

 

NEUTRAL (115 V)

 

L2

(230/208 V)

 

 

 

R

 

 

OLP

FAN MTR

 

 

S

FAN

COM

 

 

 

1 F1

L2 OR N

OLP

CAP

R

 

 

COMPRESSOR

L1

5

COMP

 

C COMPRESSOR

ELECTRONIC CONTROL

S

HERM COM

CAP

L E G E N D

CAP

- CAPACITOR

COMPR - COMPRESSOR

MTR

- FAN MOTOR

OLP

- OVERLOAD PROTECTOR

UI

- USER INTERFACE

TF

- THERMAL FUSE

HL

- HEATER LIMIT FUSE

T- THERMISTER

-COMBINATION TERMINAL

-GROUNDED LEAD SYMBOL

-INSULATOR

HTR

- HEATER ELEMENT

PART NO. REV.

92170000 04

69

Page 70
Image 70
Friedrich R-410A service manual Kuhl Electronic Control Cool only Models, Schematic

R-410A specifications

Friedrich R-410A is an advanced refrigerant widely used in HVAC (Heating, Ventilation, and Air Conditioning) systems, known for its high efficiency and environmental friendliness. As a hydrofluorocarbon (HFC) blend, R-410A has become the preferred alternative to R-22, which is being phased out due to its ozone-depleting potential. One of the main features of R-410A is its high latent heat of vaporization, which allows for efficient heat transfer and improved cooling performance in air conditioning units.

Technologically, R-410A operates at higher pressures than older refrigerants, meaning systems designed for R-410A need to be built with more robust components to safely handle these pressures. This results in a more compact system design that offers enhanced performance and reliability. The dual-component nature of R-410A—composed of difluoromethane (R-32) and pentafluoroethane (R-125)—provides an optimal balance of thermodynamic properties, leading to superior energy efficiency, especially in variable speed applications.

In terms of characteristics, R-410A has a higher cooling capacity, which enables HVAC systems to effectively cool larger spaces or run more efficiently when cooling smaller areas. The refrigerant is non-toxic and non-flammable, which enhances safety during its use. In addition, R-410A has a lower global warming potential relative to other refrigerants, making it a more environmentally responsible choice for modern cooling systems.

Moreover, R-410A systems typically require less refrigerant charge due to their efficiency, contributing to reduced greenhouse gas emissions. The adoption of R-410A aligns with regulatory trends aimed at minimizing the environmental impact of refrigerants in cooling applications.

Overall, the Friedrich R-410A refrigerant embodies a combination of technology and environmental stewardship, making it a cornerstone of contemporary HVAC design. Its ability to provide effective and energy-efficient cooling solutions while being compliant with modern environmental regulations positions R-410A as the refrigerant of choice for engineers and installers focused on sustainability and performance in air conditioning systems.